Improvement in apparatus for evaporating



J. SUTTON.

Evaporating Apparatus.

Patented y 3,

:Yr/es ses MLM N. PETERS Phalo-Lhugnyw. Wllhinglun. ILC.

UNrTnio STATES PATENT Ottica. j 0

JOHN SUTTON, OF NEV YORK, N. Y.`

l IMPROVEMENT IN APPARATUS `FORl EVAPORATIiCaz` Specification formingpart of Letters Patent No. 26,717, dated .zlnuary 3, ISCO.

To all whom it may concern,.- I

Be it known that I, JOHN SUTTON, of the city, county, and State of NewYork, have in,- vented certain new and useful Improvements in Apparatusfor Evaporating Juices and .Solutions; and I do hereby declarethat thefollowing is afull, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecih'cation, in which- Figure 1 is a vertical section of anevaporating apparatus With my invention applied. Fig. 2 is a plan of thesame with the portion above the pan removed.

Similar letters of reference'indicate corresponding parts in bothfigures.

My invention consists in so applying asteamcoil or other heater, incombination with an evaporating pan or vessel, that it shall be capableof iloating upon or in and at or as nearas may be desiredl to thesurface of the liquid, and hence of causing the evaporation to takeplace constantly at the surface or at the same distance therefrom,Whatever may be the depth or quantity of the liquid in the vessel, bywhich means some important advantages are obtained over the usual modeof applying steam coils or heaters for evaporating purposes.

My invention further consistsin the employment, in combination with asteamcoil or other i heater that is. capable of floating upon or in theliquid in an evaporating-vessel, of means of elevating the same abovethe surface of the contents of the vessel, or of sustaining the same atvarious distances below the surface of the contents of the vessel, topermit such manipu`` lations or produce such effects as may be deisirable. A i

To enable others skilled in the art to'which my invention is applicableto apply and use my invention, I will proceed to describe itsVconstruction and operation.

In the apparatus represented, the evaporatingvessel A consists of anopen pan, and the heater B consists of a steam-coil. C is thesteam-pipe, and D the pipe forletting off the Water of condensation fromthe heater, both made of flexible material, to permit the risingandfalling of the heater, thepipe C entering the vessel at the top, andbeing furnished With a cock, D, to regulate the supply of steam, and

the pipe D connecting with an outlet-cock, F,

close to the bottom ofthe vessel, for regulating y the escape of theWater of condensation. The

heater is represented as beiugifurnished with f y hollow metal floats GG, of circular form,which keep it fioati ng just below; the surfaceofthe liquid; but instead of being `thus furnished` with floats, it maybe made of itself buoyant' enough to float or be suspended and balanced,by- Weights or any suitable means to keep it at` the surface oftheliquid, orat a desirable dis-i, i tance above or below the saidsurface. H is i a cock near the bottom of the pan, for dravvlV 1 ing ofiits contents.

The heater may be heated by steam, hot air, or hot Water, according` tothe nature of the o liquid substance to be evaporated. It may be .y ofother forms besides thatlof the coil`-as,fforI instance, a gridironseries of pipes or a hollow` circular disk.

In applying the floating heater to a close b evaporating-vessel-a vacuumpan or still, for instance-the portion of the steam-pipe C im mediatelyconnected with the heater may be` straight, and passvertically through astuff# ing-box in the center ofthe` head of the pan,`f i l and theportion of the Water-pipe D iirlmedi-I ately connected with it may passvertically through a stuffing-box in the bottom of the" pan. Instead ofthe pipes of flexible material, metal pipes with Working elbewjoints maybe .T

used. 4

Among the advantages of making the heater' d float near the surface ofthe liquorthe followf` ing may be enumerated: First, theevaporation maybe commenced almost immediately when the steam or other heating mediumislet into x the heater, thus economizingtime; second, less fuel isrequired to evaporate a given quantity of liquid than by a heater thatis stationary. near the bottom of the vessel, asthe liquid is` y bboiling only near the surface, While the lower i i strata arecomparatively cool, and thus com-1 i paratively little heat `is lost byradiation froml the sides and bottom of the vessel; third,`in

cannot be affected by a too great heat, or be reboiled. A

I,.Fig. 1,is a windlass arranged over the pan with a rope or chain, J,to connect the heater, which is represented as being made with a bow, K,to attach the said cord or chain.. This windlass is furnished with aratchet-wheel, L, to be engaged by a properly-applied pawl, M. Thiswindlass serves to Withdraw the heater out of the liquid, or to raise itentirely above the p an, if necessary for the purpose of facilitatingthe discharge of the contents of the pan, or the cleaning out ofthe panor of the heater, or of permitting the repair of the pan or heater ortheir connections. It may also serve, if the hea-ter be properly loaded,to prevent it iioating, to suspend the heater at any desired distancebelow the surface of theliquid or above the bottom of the pan, as may bedesirable in certain processes or at a certain stageof any process.

Instead of the windlass l and rope J, an endless ehain or band may bearranged to run over a pulley above the vessel, and a pulley within andnear the bottom thereof, and the heater, so connected with the said bandor chain that by working the upper pulley it (the heater) may beelevated above or depressed as far as desirable below the surface oftheliquid, and so secured by a properly-applied ratchet and pawl. Thischain or band, when the pawl is disengaged from its pulley, need notinterfere with the floating of the heater when it is dcsired to loat.Other arrangements of hoist ing apparatus may be employed in connectionwith the heater. l

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

l. Se applying a steam-coil or other heater, in combination with anevaporating-vessel, that it may be independent ofthe vessel in itsaction, and may `float in and rise and fall with the surface oftheliqnid in the vessel, substantially as and for the purpose hereindescribed.

2. The employment, in combination With a so-applied heater, of means ofelevating` it wholly above and depressing it Wholly below the surface ofthe liquid, as may be desired, substantif-illy as and for the purposesherein specified.

JOHN SUTTON.

XVilnessses lt. S. SrnNonn, \VM. TUseH.

